1. a substance or device that reduces something
2. a pipe fitting that connects pipes of different sizes
Usage: plumbing
3. a chemical agent that causes reduction by donating electrons
Usage: chemistry

Examples

• The noise reducer helped make the room quieter.
• We need a reducer to connect the large pipe to the smaller one.
• The plumber installed a reducer at the junction.
• Hydrogen acts as a reducer in many chemical reactions.
• The fat reducer in the recipe made the dish healthier.
• A pressure reducer controls the flow of gas.
• The mechanic used a reducer to fit the new part.